橡胶在相变材料封装中的应用研究进展

Research Progress of Application of Rubber in Phase Change Material Encapsulation

相变材料主要用于建筑、热防护、纺织和储能等领域,节能环保。三元乙丙橡胶和硅橡胶用于石蜡和硬脂酸等有机相变材料的封装具有很好的效果,泄漏率较低,且随着相变材料含量的增大,复合相变材料的相变焓增大,相变温度变化不大,橡胶作为相变材料封装材料,具有十分广泛的应用前景。对导热性要求高的相变材料,可以在橡胶中添加导热填料进行改性,常用的导热填料有三氧化二铝、膨胀石墨、氮化物等,目前橡胶的导热改性技术已较为成熟。

Phase change materials(PCMs)are widely used in building,thermal protection,textile and energy storage fields,and have the advantages of energy saving and environmental protection.Ethylenepropylene-diene rubber(EPDM)and silicone rubber are good materials for the encapsulation of organic PCMs such as paraffin wax and stearic acid,and the encapsulated materials shows a low leakage rate.The phase change enthalpy of composite PCMs increases with the increase of PCMs content,and the phase transition temperature changes little.Rubber materials possess excellent application prospect as the encapsulation material of PCMs.PCMs with high thermal conductivity can be produced by adding heat conductive fillers,such as aluminum oxide,expanded graphite and nitride.At present,the heat conduction modification technology of rubber is mature.